We use cookies to make your experience better. To comply with the new e-Privacy directive, we need to ask for your consent to set the cookies. Learn more.
Finder 8A.04.9.024.8320 8A Series - OPTA Arduino Programmable Logic Relay
MPN: 8A.04.9.024.8320
Alt. SKU: 8A0490248320
Special Price
£168.31
£140.26
Regular Price
£224.41
Finder 8A.04.9.024.8320 8A Series - OPTA Arduino Programmable Logic Relay is available to buy in increments of 5
Why Choose the Finder 8A.04.9.024.8320 OPTA Advanced Programmable Logic Relay
The Finder 8A.04.9.024.8320 is the OPTA Advanced programmable logic relay (PLR) that adds Wi-Fi and Bluetooth Low Energy alongside Ethernet and RS-485 Modbus RTU. With 8 configurable inputs (digital or 0-10 V analogue), 4 relay outputs rated 10 A AC1, and USB-C for programming and data logging, it brings PLC-class capability to compact control panels.
At a Glance
- Supply voltage: 12 to 24 V DC
- Inputs: 8 configurable digital or 0-10 V analogue
- Outputs: 4 relay outputs, 10 A AC1 at 250 V AC (NO)
- Interfaces: Ethernet RJ-45, USB-C, RS-485 Modbus RTU, Wi-Fi and BLE
- Programming: Arduino IDE or IEC 61131-3 environments
- Mounting: DIN-rail EN 60715
- Operating temperature: minus 20 °C to plus 55 °C
- Variant: OPTA 8A.04 Advanced – model 8A.04.9.024.8320
Key Benefits
- Wireless built in: Wi-Fi and BLE enable dashboards, mobile tools and cable-free commissioning.
- Fieldbus ready: RS-485 Modbus RTU for straightforward machine and plant integration.
- Flexible I/O: 8 inputs selectable as digital or 0-10 V analogue for direct sensor connection.
- Industrial switching: 4 x 10 A relay outputs to drive contactors, solenoids and utility loads.
- Developer choice: Arduino workflows or classic IEC 61131-3 to suit your team.
Technical Specifications
- Manufacturer: Finder S.p.A.
- Series and model: OPTA 8A – 8A.04.9.024.8320 (Advanced)
- Rated supply: 12 to 24 V DC
- Inputs: 8 x DI or AI 0-10 V configurable
- Outputs: 4 x relay NO, 10 A AC1 at 250 V AC
- Ports: USB-C, RJ-45 Ethernet, RS-485 Modbus RTU
- Wireless: Wi-Fi and Bluetooth Low Energy
- Mounting: DIN-rail EN 60715
- Operating temperature: minus 20 °C to plus 55 °C
- Typical applications: OEM machines, networked monitoring, IIoT retrofits, plant gateways
Installation note: Mount on DIN-rail EN 60715 and power from a clean 12 to 24 V DC supply. Configure input type per channel (digital or 0-10 V) to match sensors. Verify relay load ratings and inrush; interpose a contactor for heavy inductive loads. Use USB-C for initial setup and firmware, Ethernet or RS-485 for plant networks, and provision secure Wi-Fi credentials when enabling wireless.
Frequently Asked Questions
What does the Advanced version add over the Plus
The Advanced model adds Wi-Fi and Bluetooth Low Energy on top of Ethernet, USB-C and RS-485 Modbus RTU. I/O and supply are the same as the Plus model.
Can all inputs be used as analogue
Yes. All 8 inputs can be configured as 0-10 V analogue or used as standard digital inputs.
How are the relay outputs rated
There are 4 normally open relay outputs rated 10 A AC1 at 250 V AC. For high inrush or inductive loads, use an interposing contactor and fit snubbers where appropriate.
Which tools can I use to program it
Program with the Arduino IDE or an IEC 61131-3 environment. USB-C is used for programming and diagnostics. Some variants in the 8A.04 family also support Codesys on specific part numbers.
Is wireless always enabled
No. Wi-Fi and BLE can be disabled if your site policies require wired-only operation. Use Ethernet or RS-485 in such cases.
| Manufacturer Part Number | 8A.04.9.024.8320 |
|---|---|
| Alternative Product SKU | 8A0490248320 |
| Manufacturer | Finder |
| Range | 8A |
| Barcode | 8012823445427 |
| HS Code | 85371098 |
| Rated current | 10A |
| Contact Configuration | 4 NO (SPST) |
| Max. peak current | 15A |
| Max. switching voltage (control contacts) | 400VDC |
| Rated voltage | 250VAC |
| Rated load AC1 | 2500VA |
| Rated load AC15 (230 V AC) | 500VA |
| Minimum switching load | 300mW (5V/5mA) |
| Output operate/release time | 6/4ms |
| Contact material | AgNi |
| Nominal voltage DC | 12-24VDC |
| Operating range | 10.2-27.6VDC |
| Software Included | Arduino IDE or Arduino PLC-IDE |
| Height | 84mm |
| Width | 70mm |
| Depth | 56.8mm |
| Packed Quantity | 5 |
| Country of Manufacture | Italy |
Write Your Own Review
